Fiber communication systems and methods
AssigneeCable Television Laboratories, Inc.
InventorsZhensheng Jia, Luis Alberto Campos, Curtis Dean Knittie, Jing Wang
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Abstract
An injection locked transmitter for an optical communication network includes a master seed laser source input substantially confined to a single longitudinal mode, an input data stream, and a laser injected modulator including at least one slave laser having a resonator frequency that is injection locked to a frequency of the single longitudinal mode of the master seed laser source. The laser injected modulator is configured to receive the master seed laser source input and the input data stream, and output a laser modulated data stream.
Claims20
An optical communication network for a passive optical network (PON) system architecture, comprising:
- an optical hub including at least one parent seed laser source and at least one optical line terminal (OLT) configured to transmit a downstream signal of the parent seed laser source, wherein the downstream signal includes a plurality of spaced wavelength channels;
- an optical transport medium configured to carry the downstream signal from the optical hub;
- and
- a plurality of distributed optical network units (ONUs) operably coupled to the optical transport medium, each ONU of the plurality of distributed ONUs (i) configured to receive at least one channel of the plurality of spaced wavelength channels, and (ii) including at least one child laser source injection locked to the parent seed laser source,
- wherein each ONU comprises (i) an optical circulator configured to receive a linewidth of the parent laser source and inject the received linewidth into a respective child laser source of the ONU, (ii) an optical receiver configured to perform homodyne detection to detect the at least one channel received at the respective ONU.
An optical communication network for a passive optical network (PON) system architecture, comprising:
- an optical hub including at least one parent seed laser source and at least one optical line terminal (OLT) configured to transmit a downstream signal of the parent seed laser source, wherein the downstream signal includes a plurality of spaced wavelength channels;
- an optical transport medium configured to carry the downstream signal from the optical hub;
- and
- a plurality of distributed optical network units (ONUs) operably coupled to the optical transport medium, each ONU of the plurality of distributed ONUs (i) configured to receive at least one channel of the plurality of spaced wavelength channels, and (ii) including at least one child laser source injection locked to the parent seed laser source,
- wherein each ONU comprises (i) an optical circulator configured to receive a linewidth of the parent seed laser source and inject the received linewidth into a respective child laser source of the ONU, (ii) an optical receiver configured to detect the respective at least one channel received at the ONU, and (iii) an uplink modulator configured to transmit a modulated, injection locked upstream signal from the respective child laser source to the optical hub.
A coherent optical transceiver in operable communication with an optical transport medium of an optical communication network, the coherent optical transceiver comprising:
- an optical circulator configured to receive a downstream coherent signal from the optical transport medium, the downstream coherent signal including a plurality of spaced wavelength channels from an upstream transmission source;
- a child laser source in operable communication with the optical circulator and configured for injection locking to a linewidth of a parent seed laser of the upstream transmission source;
- an optical receiver in operable communication with the optical circulator and configured to detect the at least one channel of the plurality of spaced wavelength channels;
- and
- an uplink modulator configured to transmit a modulated, injection locked upstream signal from the child laser source onto the optical transport medium.
Dependencies are inferred from the claim text.